From 9684d1176621e7edee8475dbd3ad186591898b21 Mon Sep 17 00:00:00 2001 From: Mario Kleiner Date: Fri, 6 May 2016 19:26:05 +0200 Subject: [PATCH] drm/vc4: Fix get_vblank_counter with proper no-op for Linux 4.4+ get_vblank_counter hooked up to drm_vblank_count() which alway was non-sensical but didn't hurt in the past. Since Linux 4.4 it triggers a WARN_ON_ONCE in drm_update_vblank_count on first vblank irq disable, so fix it by hooking to drm_vblank_no_hw_counter(). Tested against Raspian kernel 4.4.8 tree on RPi 2B. Signed-off-by: Mario Kleiner Cc: Eric Anholt Signed-off-by: Eric Anholt --- drivers/gpu/drm/vc4/vc4_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/vc4/vc4_drv.c +++ b/drivers/gpu/drm/vc4/vc4_drv.c @@ -102,7 +102,7 @@ static struct drm_driver vc4_drm_driver .enable_vblank = vc4_enable_vblank, .disable_vblank = vc4_disable_vblank, - .get_vblank_counter = drm_vblank_count, + .get_vblank_counter = drm_vblank_no_hw_counter, #if defined(CONFIG_DEBUG_FS) .debugfs_init = vc4_debugfs_init,